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1. 发明授权

US08656065B1 Method and apparatus for automatically selecting a plurality of modes for programmable interface circuit by coupling field devices to process controllers 有权
标题翻译：用于通过将现场设备耦合到过程控制器来自动选择可编程接口电路的多种模式的方法和装置
公开(公告)号：US08656065B1
公开(公告)日：2014-02-18
申请号：US13753108
申请日：2013-01-29
申请人： Honeywell International Inc.
发明人： Paul Gerhart , Christopher Ladas , Angela Lordi , Benjamin J. Stad
IPC分类号： G06F3/00 , G06F13/12
CPC分类号： G06F13/385
摘要： A programmable interface circuit includes channel(s) including a digital logic block having terminals for receiving control signals from a process controller block, for providing logic signals, and terminals for receiving processed signal data. An analog logic block includes a current output digital to analog converter (DAC). An output circuit block includes first and second field terminals (S1,S2) and a sense resistor, wherein current from the DAC is coupled to S1 and the sense resistor is coupled to S2. The analog logic block includes a first and a second multi-channel multiplexer (MUX), an operational amplifier, and an analog to digital converter (ADC). The control signals automatically select from signal modes including an analog output (AO) mode, a digital output (DO) mode, an analog input (AI) mode, a digital input (DI) mode, and at least one additional signal mode provided by adding a sub-mode to the AI mode or DI mode.
摘要翻译：可编程接口电路包括具有数字逻辑块的通道，该数字逻辑块具有用于接收来自过程控制器块的控制信号，用于提供逻辑信号的终端和用于接收经处理的信号数据的终端。模拟逻辑块包括电流输出数模转换器（DAC）。输出电路块包括第一和第二场端子（S1，S2）和检测电阻器，其中来自DAC的电流耦合到S1，并且检测电阻器耦合到S2。模拟逻辑块包括第一和第二多通道多路复用器（MUX），运算放大器和模数转换器（ADC）。控制信号自动从信号模式中选择，包括模拟输出（AO）模式，数字输出（DO）模式，模拟输入（AI）模式，数字输入（DI）模式）和至少一个附加信号模式在AI模式或DI模式下添加子模式。

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